Specifications

MC55/56 Hardware Interface Description
Confidential / Released
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MC55/56_hd_v04.00a Page 20 of 108 24.08.2006
2.1 MC55/56 key features at a glance
Table 1: MC55/56 key features
Feature Implementation
Power supply Single supply voltage 3.3V – 4.8V
Power saving Minimizes power consumption in SLEEP mode to 3mA
Charging Supports charging control for Li-Ion battery
Frequency bands
• MC55 Tri-band: EGSM 900, GSM 1800, GSM 1900
• MC56 Tri-band: GSM 850, GSM 1800, GSM 1900
• Compliant to GSM Phase 2/2+
GSM class Small MS
Transmit power
• Class 4 (2W) at EGSM 900 and GSM 850
• Class 1 (1W) at GSM 1800 and GSM 1900
GPRS connectivity
• GPRS multi-slot class 10
• GPRS mobile station class B
Ambient operating
temperature according
to IEC 60068-2
• Normal operation: -20°C to +55°C
• Restricted operation: -25°C to -20°C and +55°C to +70°C
• Automatic thermal shutdown: -25°C and +70°C
When an emergency call is in progress automatic temperature shutdown
is deferred.
Humidity max. 90 % relative humidity
DATA GPRS:
CSD:
• GPRS data downlink transfer: max. 85.6 kbps (see Table 2)
• GPRS data uplink transfer: max. 42.8 kbps (see Table 2)
• Coding scheme: CS-1, CS-2, CS-3 and CS-4
• MC55/56 supports the two protocols PAP (Password Authentication
Protocol) and CHAP (Challenge Handshake Authentication Protocol)
commonly used for PPP connections.
• Support of Packet Switched Broadcast Control Channel (PBCCH) allows
you to benefit from enhanced GPRS performance when offered by the
network operators.
• CSD transmission rates: 2.4, 4.8, 9.6, 14.4 kbps, non-transparent, V.110
• Unstructured Supplementary Services Data (USSD) support
SMS
• MT, MO, CB, Text and PDU mode
• SMS storage: SIM card plus 25 SMS locations in the mobile equipment
• Transmission of SMS alternatively over CSD or GPRS. Preferred mode
can be user-defined.
TCP/IP stack Internet services: TCP, UDP, HTTP, FTP, SMTP, POP3
Access by AT commands
FAX Group 3: Class 1, Class 2
SIM interface
• Supported SIM card: 3V
• External SIM card reader has to be connected via interface connector
(note that card reader is not part of MC55/56)
External antenna Connected via 50 Ohm antenna connector or antenna pad